- 您现在的位置：买卖IC网 > PDF目录16527 > XR20V2172L64-0B-EB (Exar Corporation)EVAL BOARD FOR XR20V2170 64QFN PDF资料下载
参数资料
| 型号： | XR20V2172L64-0B-EB |
| 厂商： | Exar Corporation |
| 文件页数： | 5/51页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR20V2170 64QFN |
| 标准包装： | 1 |
| 系列： | * |
第1页第2页第3页第4页当前第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页
XR20V2172
13
REV. 1.0.2
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER
2.8.2
Transmitter Operation in non-FIFO Mode
The host loads transmit data to THR one character at a time. The THR empty flag (LSR bit-5) is set when the
data byte is transferred to TSR. THR flag can generate a transmit empty interrupt (ISR bit-1) when it is enabled
by IER bit-1. The TSR flag (LSR bit-6) is set when TSR becomes completely empty.
FIGURE 8. TRANSMITTER OPERATION IN NON-FIFO MODE
Transmit
Holding
Register
(THR)
Transmit Shift Register (TSR)
Data
Byte
L
S
B
M
S
B
THR Interrupt (ISR bit-1)
Enabled by IER bit-1
TXNOFIFO1
16X or 8X or 4X
Clock
( DLD[5:4] )
2.8.3
Transmitter Operation in FIFO Mode
The host may fill the transmit FIFO with up to 64 bytes of transmit data. The THR empty flag (LSR bit-5) is set
whenever the FIFO is empty. The THR empty flag can generate a transmit empty interrupt (ISR bit-1) when the
amount of data in the FIFO falls below its programmed trigger level. The transmit empty interrupt is enabled by
IER bit-1. The TSR flag (LSR bit-6) is set when TSR/FIFO becomes empty.
FIGURE 9. TRANSMITTER OPERATION IN FIFO AND FLOW CONTROL MODE
Transmit Data Shift Register
(TSR)
Transmit
Data Byte
THR Interrupt (ISR bit-1) falls
below the programmed Trigger
Level and then when becomes
empty. FIFO is Enabled by FCR
bit-0=1
Transmit
FIFO
16X or 8X or 4X Clock
( DLD[5:4] )
Auto CTS Flow Control (CTS# pin)
Auto Software Flow Control
Flow Control Characters
(Xoff1/2 and Xon1/2 Reg.)
TXFIFO 1
相关PDF资料 |
PDF描述 |
|---|---|
| UPM1E181MPD6TD | CAP ALUM 180UF 25V 20% RADIAL |
| AQ1051N8S-T | INDUCTOR 1.8NH 760MA 0402 SMD |
| UPS2G3R3MPD1TD | CAP ALUM 3.3UF 400V 20% RADIAL |
| XR20V2172L64-0A-EB | EVAL BOARD FOR XR20V2170 64QFN |
| UPJ1C331MPD6TD | CAP ALUM 330UF 16V 20% RADIAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XR-210 | 制造商:EXAR 制造商全称:EXAR 功能描述:FSK MODULATOR / DEMODULATOR |
| XR-2100CJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MODEM |
| XR-2100CP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MODEM |
| XR-2103 | 制造商:EXAR 制造商全称:EXAR 功能描述:FSK Modem Filter |
| XR-2103A | 制造商:EXAR 制造商全称:EXAR 功能描述:FSK Modem Filter |
发布紧急采购，3分钟左右您将得到回复。